87 
WINGLESS FEMALE. 
Fig. 13.—Melon plant-louse (Aphis cucnmeris, n. s.) Wing¬ 
less female, magnified 40 diameters. 
Body green or greenish-black throughout, antennae black at base 
nid tip ; cornicles black, tail yellowish, legs pale, with tarsi and 
ip of tibiae black. Body broad ovale, widest behind, thorax with- 
>ut spine. Cornicles minutely roughened. Antennae with imbricated 
ransverse ridges,_ excepting the two basal joints. Body .06 inch 
ong, .037 inch wide, antennae .05 inch in length, cornicles .013 inch. 
ROOT FORM. 
Broad ovate, tapering and acuminate 
posteriorly, pale bluish green. Head, 
eyes, base and tip of antennae, two basal 
and last joints of tarsi, tips of tibiae and 
femora, and tip of cornicles, black; legs 
white. Beak very long, reaching to the 
third segment of the abdomen, tip black¬ 
ish, mouth at and about the base of 
rostrum dusky. Antennae short, reaching 
the base of the abdomen, five-jointed, 
and the fifth with a setaceous tip less 
than twice as long as the basal portion; 
third joint about equal to the fifth. 
Cornicles cylindrical, scarcely longer than 
the following segment of the abdomen. 
„ , , , , , 7 . Thorax with a spine each side. A tu- 
X cucumJrit, n?sj^Rootform,'mag- bercle on each side of the first and sixth 
nifled 40 diameters. abdominal segments, visible only from 
eliind, and a very small one on the metatliorax, behind the pro- 
boracic spine. Length, .05 inch; width, .03 inch ; antenna?, .02 inch. 
